import type { Localize, LocalizeFn } from "../../../types";
import { buildLocalizeFn } from "../../../_lib/buildLocalizeFn/index";

const eraValues = {
  narrow: ["B", "A"] as const,
  abbreviated: ["BC", "AD"] as const,
  wide: ["Before Christ", "Anno Domini"] as const,
};

const quarterValues = {
  narrow: ["1", "2", "3", "4"] as const,
  abbreviated: ["Q1", "Q2", "Q3", "Q4"] as const,
  wide: ["1st quarter", "2nd quarter", "3rd quarter", "4th quarter"] as const,
};

// Note: in English, the names of days of the week and months are capitalized.
// If you are making a new locale based on this one, check if the same is true for the language you're working on.
// Generally, formatted dates should look like they are in the middle of a sentence,
// e.g. in Spanish language the weekdays and months should be in the lowercase.
const monthValues = {
  narrow: ["J", "F", "M", "A", "M", "J", "J", "A", "S", "O", "N", "D"] as const,
  abbreviated: [
    "Jan",
    "Feb",
    "Mar",
    "Apr",
    "May",
    "Jun",
    "Jul",
    "Aug",
    "Sep",
    "Oct",
    "Nov",
    "Dec",
  ] as const,
  wide: [
    "January",
    "February",
    "March",
    "April",
    "May",
    "June",
    "July",
    "August",
    "September",
    "October",
    "November",
    "December",
  ] as const,
};

const dayValues = {
  narrow: ["S", "M", "T", "W", "T", "F", "S"] as const,
  short: ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"] as const,
  abbreviated: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"] as const,
  wide: [
    "Sunday",
    "Monday",
    "Tuesday",
    "Wednesday",
    "Thursday",
    "Friday",
    "Saturday",
  ] as const,
};

const dayPeriodValues = {
  narrow: {
    am: "a",
    pm: "p",
    midnight: "mi",
    noon: "n",
    morning: "morning",
    afternoon: "afternoon",
    evening: "evening",
    night: "night",
  },
  abbreviated: {
    am: "AM",
    pm: "PM",
    midnight: "midnight",
    noon: "noon",
    morning: "morning",
    afternoon: "afternoon",
    evening: "evening",
    night: "night",
  },
  wide: {
    am: "a.m.",
    pm: "p.m.",
    midnight: "midnight",
    noon: "noon",
    morning: "morning",
    afternoon: "afternoon",
    evening: "evening",
    night: "night",
  },
};

const formattingDayPeriodValues = {
  narrow: {
    am: "a",
    pm: "p",
    midnight: "mi",
    noon: "n",
    morning: "in the morning",
    afternoon: "in the afternoon",
    evening: "in the evening",
    night: "at night",
  },
  abbreviated: {
    am: "AM",
    pm: "PM",
    midnight: "midnight",
    noon: "noon",
    morning: "in the morning",
    afternoon: "in the afternoon",
    evening: "in the evening",
    night: "at night",
  },
  wide: {
    am: "a.m.",
    pm: "p.m.",
    midnight: "midnight",
    noon: "noon",
    morning: "in the morning",
    afternoon: "in the afternoon",
    evening: "in the evening",
    night: "at night",
  },
};

const ordinalNumber: LocalizeFn<number> = (dirtyNumber, _options) => {
  const number = Number(dirtyNumber);

  // If ordinal numbers depend on context, for example,
  // if they are different for different grammatical genders,
  // use `options.unit`.
  //
  // `unit` can be 'year', 'quarter', 'month', 'week', 'date', 'dayOfYear',
  // 'day', 'hour', 'minute', 'second'.

  const rem100 = number % 100;
  if (rem100 > 20 || rem100 < 10) {
    switch (rem100 % 10) {
      case 1:
        return number + "st";
      case 2:
        return number + "nd";
      case 3:
        return number + "rd";
    }
  }
  return number + "th";
};

export const localize: Localize = {
  ordinalNumber,

  era: buildLocalizeFn({
    values: eraValues,
    defaultWidth: "wide",
  }),

  quarter: buildLocalizeFn({
    values: quarterValues,
    defaultWidth: "wide",
    argumentCallback: (quarter) => quarter - 1,
  }),

  month: buildLocalizeFn({
    values: monthValues,
    defaultWidth: "wide",
  }),

  day: buildLocalizeFn({
    values: dayValues,
    defaultWidth: "wide",
  }),

  dayPeriod: buildLocalizeFn({
    values: dayPeriodValues,
    defaultWidth: "wide",
    formattingValues: formattingDayPeriodValues,
    defaultFormattingWidth: "wide",
  }),
};
